Output encoding missing in redrurl parameter

When using local accounts for administration, the redirect url parameter was not encoded correctly, allowing for an XSS attack providing admin login.

A URL parameter during login flow was vulnerable to injection. An attacker could insert a malicious domain in this parameter, which would redirect the user after auth and send the authorization token to the redirected domain.

Inappropriate file type control in Zscaler Proxy versions 3.6.1.25 and prior allows local attackers to bypass file download/upload restrictions.

Linux ZCC allows unsigned updates, allowing elevated Code Execution

An Improper Verification of Cryptographic Signature vulnerability in Zscaler Client Connector on Linux allows replacing binaries.This issue affects Linux Client Connector: before 1.4.0.105

Traffic being bypassed by ZCC by configuring synthetic IP range as local network

An authentication bypass by spoofing of a device with a synthetic IP address is possible in Zscaler Client Connector on Windows, allowing a functionality bypass. This issue affects Client Connector: before 3.9.

Improper SAML signature verification

An Improper Verification of Cryptographic Signature in the SAML authentication of the Zscaler Admin UI allows a Privilege Escalation.This issue affects Admin UI: from 6.2 before 6.2r.

PAC Files Exposed to Internet Websites

Origin Validation Error vulnerability in Zscaler Client Connector on Linux allows Privilege Abuse. This issue affects Zscaler Client Connector for Linux: before 1.3.1.6.

Privilege Escalation Using PID Reuse in ZCC macOS

The Zscaler Client Connector for macOS prior to 3.6 did not sufficiently validate RPC clients. A local adversary without sufficient privileges may be able to shutdown the Zscaler tunnel by exploiting a race condition.

Junction Delete leading to elevation of privilege

Zscaler Client Connector Installer on Windows before version 3.4.0.124 improperly handled directory junctions during uninstallation. A local adversary may be able to delete folders in an elevated context.

The Zscaler Client Connector prior to 3.1.0 did not sufficiently validate RPC clients, which allows a local adversary to execute code with system privileges or perform limited actions for which they did not have privileges.

The Zscaler Client Connector for Windows prior to 2.1.2.105 had a DLL hijacking vulnerability caused due to the configuration of OpenSSL. A local adversary may be able to execute arbitrary code in the SYSTEM context.

The Zscaler Client Connector for Windows prior to 2.1.2.74 had a stack based buffer overflow when connecting to misconfigured TLS servers. An adversary would potentially have been able to execute arbitrary code with system privileges.

The Zscaler Client Connector prior to 2.1.2.150 did not quote the search path for services, which allows a local adversary to execute code with system privileges.

Signature validation issue leads to Anti-Tampering bypass

Anti-tampering can be disabled under certain conditions without signature validation. This affects Zscaler Client Connector <4.2.0.190 with anti-tampering enabled.

Signature validation error in DLL allows disabling anti-tampering protection

An Improper Validation of signature in Zscaler Client Connector on Windows allows an authenticated user to disable anti-tampering. This issue affects Client Connector on Windows <4.2.0.190.

Local Privilege Escalation on Zscaler Client Connector on Windows

While copying individual autoupdater log files, reparse point check was missing which could result into crafted attacks, potentially leading to a local privilege escalation. This issue affects Zscaler Client Connector on Windows <4.2.0.190.

Incorrect signature validation of package

The Zscaler Updater process does not validate the digital signature of the installer before execution, allowing arbitrary code to be locally executed. This affects Zscaler Client Connector on MacOS <4.2.

Zscaler bypass with administrative privileges on Windows

In certain cases, Zscaler Internet Access (ZIA) can be disabled by PowerShell commands with admin rights. This affects Zscaler Client Connector on Windows <4.2.1

Local Privilege Escalation via lack of input validation

An Improper Input Validation vulnerability in Zscaler Client Connector on MacOS allows OS Command Injection. This issue affects Zscaler Client Connector on MacOS <4.2.